Table 4.

HRAS mutations frequencies in phaeochromocytoma and paraganglioma.

Study	Overall frequency of  HRAS mutations			Frequency of HRAS in PCC/PGL  with unknown mutations			Frequency of HRAS in PCC  with unknown mutations
		All	Positive samples		All	Positive samples		All	Positive samples
Current study	7,06%	85	6	12,24%	49	6	13,95%	43	6
Crona et al. [19]	4,88%	82	4	7,14%	56	4	6,00%	50	3
Oudijk et al. [20]	5,17%	271	14	8,54%	164	14	10,00%	140	14
Total	5,48%	438	24	8,92%	269	24	9,87%	233	23